Cooling Operation - Fujitsu AW*Z24LBC Service Instruction

1. COOLING OPERATION

1-1 COOLING CAPACITY CONTROL
A sensor (room temperature thermistor) built in the indoor unit body will usually perceive
difference or variation between a set temperature and present room temperature, and
controls the operation frequency of the compressor.
* If the room temperature is 2°C higher than a set temperature, the compressor operation
frequency will attain to maximum performance.
* If the room temperature is 2.5°C lower than a set temperature, the compressor will be
stopped.
* When the room temperature is between +2°C to -2.5°C of the setting temperature,
the compressor frequency is controlled within the range shown in Table1.
However, the maximum frequency is limited in the range shown in Figure 1 based on the
fan speed mode and the outdoor temperature.
( Table 1 : Compressor Frequency Range )
AW * Z24LBC
( Fig.1 : Limit of Maximum Frequency based on Outdoor Temperature )
Outside air
temperature
A zone
34°C
B zone
30°C
C zone
19°C
D zone
10°C
E zone
0°C
F zone
When the compressor operates for 30 minutes continuously at over the maximum frequency ,
the maximum frequency is changed from Maximum Frequency
The room temperature is controlled 1°C lower than the setting temperature for 40 minutes
after starting the operation.
After 40 minutes, it is controlled based on the normal setting temperature.
minimum maximum
frequency frequency
21Hz 47Hz
Outside air
temperature
36°C
32°C
24LBC
21°C
12°C
2°C
maximum
frequency
63Hz
Hi
A zone 63Hz
B zone 63Hz
C zone 57Hz
D zone 39Hz
E zone 39Hz
F zone 39Hz
to Maximum Frequency .
05-01
Me Lo Quiet
43Hz 37Hz 27Hz
43Hz 37Hz 27Hz
39Hz 33Hz 23Hz
31Hz 27Hz 21Hz
31Hz 27Hz 21Hz
31Hz 27Hz 21Hz
S-Quiet
25Hz
25Hz
21Hz
21Hz
21Hz
21Hz